A high efficiency MHD lamp ballast with a frequency controlled synchronous rectifier

I. K. Lee, B. H. Cho

Research output: Contribution to conferencePaper

2 Citations (Scopus)

Abstract

In this paper, in order to develop a simple and high efficient ballast without an external ignitor, a half-bridge type ballast with a coupled inductor and a frequency controlled synchronous rectifier is proposed. The internal LC resonance of the buck converter is used to generate a high voltage pulse for the ignition, and the coupled inductor filter is used for steady state ripple cancellation. Also, a synchronous buck converter is applied for the DC/DC converter stage. In order to improve the efficiency of the ballast, a frequency control method is proposed. This scheme reduces a circulation current and turn off loss of the MOSFET switch on the constant power operation, which results in increase of the efficiency of the ballast system about 4 %, compared to a fixed frequency control. It consists a 2 stage version ballast with a PFC circuit. The results are verified with hardware experiments.

Original languageEnglish
Pages973-977
Number of pages5
Publication statusPublished - 2004
Event19th Annual IEEE Applied Power Electronics Conference and Exposition - APEC 2004 - Anaheim, CA., United States
Duration: 2004 Feb 222004 Feb 26

Other

Other19th Annual IEEE Applied Power Electronics Conference and Exposition - APEC 2004
CountryUnited States
CityAnaheim, CA.
Period04/2/2204/2/26

Keywords

  • 2-stage ballast
  • Coupled inductor
  • Frequency control
  • Synchronous rectifier

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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  • Cite this

    Lee, I. K., & Cho, B. H. (2004). A high efficiency MHD lamp ballast with a frequency controlled synchronous rectifier. 973-977. Paper presented at 19th Annual IEEE Applied Power Electronics Conference and Exposition - APEC 2004, Anaheim, CA., United States.